After you show us your disks with:
sudo lsblk -o NAME,FSTYPE,SIZE,MOUNTPOINT,LABEL
You'll see a bunch of disk paths that will start with /dev/sd where the
is going to be a letter. Ubuntu gives letters in alphabetical order to each
drive so if you have two physical drives, you will see an sda and sdb.
Now, you should be able to identify your partition, the one you want to
mount, given that it will tell you the size and format type (and name). So
once you find that drive (a, b, c...) you need to also find the partition
number which is the number after the lower case letter.
With this info, you want to create a mounting point on your drive (you
need to tell ubuntu where you want to place the partition) and you do that
by creating a directory (for this example, lets call it
Last part is mounting it. Assuming it's ntfs which is likely, you can
mount your drive by running:
sudo mount -t ntfs-3g /dev/sd<X><number>
You should now be able to access your files and folders and move them
around as you please.